public class DataType {
    public static void main(String[] args) {

        //整数
        System.out.println(666);
        System.out.println(-777);

        //小数
        System.out.println(1.93);
        System.out.println(-1.37);

        //字符串
        System.out.println("哈哈哈哈哈哈");
        System.out.println("阿巴啊吧啊吧");

        //字符
        System.out.println('嘿');
        System.out.println('哈');

        //布尔
        System.out.println(true);
        System.out.println(false);

        //空
        System.out.println("null");

        //byte、short、int
        byte b=10;
        short s=20;
        int i=30;
        System.out.println(b);
        System.out.println(s);
        System.out.println(i);

        //long
        long n=999999999L;
        System.out.println(n);

        //float、double
        float f=10.1F;
        double d=20.2;
        System.out.println(f);
        System.out.println(d);

        //char
        char c='中';
        System.out.println(c);

        //boolean
        boolean o=true;
        System.out.println(o);
    }
}
